Hardening composition for lime



i To all whim it may concem:

Patented July 28, 1925 .UNITED .s'rA

frss PATENT OFFI E.

,AI'BERI A. OF PITTSBURGH, PENNSYLVANIA.

p nannmwme comr Il'o Drawing. Application filed December .My inventionconsists in so preparing the hardening agent that it may be introducedin the familiar operation of mixing mortar, and, being added will beeffective to increase the indurationof the mortar when, after I being)mixed it is spread.

' and by thoroughly mixing together finely ivided coke and finelydivided anhydrous calcium chloride. I crush furnace coke and granulateit. Then spread the chloride uponthe coke and poun and rub, makingintimate mixture. Incident to this step of the operation, a greatincrease in volume occurs which, provisionally, I impute to theabsorption by thechloride of. the carbonaceous gases occluded in thecoke.

To the relatively bulky mixture so produced I addinert finely dividedmaterial,

and I have found suitable for this purpose,

and available in sufficient quantity and as a refuse materialhaving'little or no intrinsic value,-the ashes of soft coal. 1' mix theashes with the mixture first described, preferably inding the wholetogether, and

when I ive so achieved this' second mixing .1. add also finely dividedcarbon, prefste erably in the form of charcoal, and continue the mixingoperation until I et thorough.

distribution and intimate mingling of all the ingredients. Igive-proportions of an actual mixture, prepared in the" performance ofmy invention. I give this statement of proportions by way of example,merely, I begin by taking equal volumesof coke dust of commercialcalcium chloride and pound and rub them to' ther, If in the resultingmixture the c, loride in dient shows white, I add a little more co edust,

and continue pounding and rubbing, till the white appearance disappears.To-six parts of Mason s hydrate (a commercial-lime) I osITIoN non LIME.v

80, 1924. Serialli'o. 758,948.

add one part ofthe compound prepared in the manner described, and tothis body of compound I find it advantageous to add small quantities ofcoal ashes and 'of powdered charcoal. I find it good to add 5%., by.volume, of coal ashes and 0.5% of powdered charcoal. These componentsare mixed to homogeneity, and finally, the mixture is combined withsand, in the ratio of 1:25.

Inpreparing for 7 use, water added -1n relatively small quantities atfirst, and themass is worked slowly.

The material so prepared does not deteri-' crate, and may be put up insacks and shipped, as lime is shipped.

When mortar is mixed, of lime and sand,

with water, [the material I-have described may be added, and mixed in,precisely as the lime is added and mixed in. The resultant plaster willbe foundto harden to a high 1 degree of induration througout the depthof the layer in which'it may be spread.

. Experimentation has revealed the fact that the-ultimate additionofcharcoal to my preparation as described above insures equal indurationthroughout all themass of mortar whenitsets. I claim as my invention 1i 1. A hardening composition for lime'ineluding finely divided coke andcalcium chloride intimately mixed together. .2. A hardening compositionfor lime including finely divided coke and calcium chloride, intimatelymixed together, and distributed througlr an inert finely dividedcarrier. p

3. A hardening composition "for lime ineluding finelybd-ivided coke andcalcium chloride, intimately mixed together and. distributed through acarrier of coal ashes. 4. A hardening composition for limeinintimately-mixedtogether, and distogether'with finely divided carbonparing a .hardeningcomposition for which consists in grinding'togethercoke and calcium chloride, and distributing the mixture, together withcharcoal dust in a mam' of coal ashes the mass of an inert.finelydivided mo as eluding finely] divided coke and calcium u Masonshydrate and of specially'prepared- 6. The method herein described ofreparing a hardening composition for ime which consists in granulatingcoke, spreading anhydrous calcium chloride upon the mass of granulatedcoke, pounding and rubbing the material and making intimate mixture ofthe said components, and distributing the mixture together with finelydivided carbon through the mass of inert finely divided material.

In testimony whereof I have hereunto set my hand. ALBERT A. ALLES.

Witnesses:

BAYARD H. CHRISTY,

PERCY A. ENGLISH.

